Warp-beam motion for looms.



C. SPANNAGEL.

WARP BEAM MOTION FOR LOOMS.

APPLICATION FILED APR.24. 191s.

Patented J une 26, 1917.

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CARL SPANNAGEL, 0F BERLIN, GERMANY.

WARP-BEAM MOTION FOR LOOMS.

Specification of Letters Patent.

Patented June 26, 191?,

Application filed April 24, 1915. Serial N 0. 23,558.

To all whom it may concern:

Be it known that I, CARL SPANNAGEL, a subject of the German Emperor, and residing at Berlin, Germany, have invented certain new and useful Improvements in Warp- Beam Motions for Looms, of which the fol: lowing is a specification.

This invention relates to warp beam motions for looms and the object is to insure an even and smooth drawing off of the chain from the warp beam. This result is obtained by means of weighted cords which are wound on both sides around the warp beam as well as around two rolls, which are easily rotatable on ball bearings or the like. The free ends of the cords are attached to weighted levers.

In Figures 1 and 2 of the accompanying drawings a side and front elevation of one mode of execution are represented.

Cords 21 are wound around the two end axles 20 of the warp beam 19 and carry on their rear ends a weight 22, which can be as broad as the warp beam and can be regulated in its action by means of additional weights 22 The other ends of the two cords 21 are wound several times around guiding rolls 23 and 24 and attached to a weighted lever 25, which is pivoted at 26. Two of these levers are used one at each side of the loom and the upper position of these levers is limited by stops 27.

It is essential for insuring an easy play in drawing off the chain, that the rolls 28, 21 rotate with very little friction on their spindles; for this purpose the rolls run on ball bearings or the like.

If a drawing action takes place on the warp threads the warp beam 19 rotates on its axle and lets off just as much material as is wanted.

It will thus be seen that the use of countersprings is thereby eliminated. The same have the disadvantage that they vibrate if the shed is suddenly opened or closed. This vibration is a great disadvantage, as the tension of the chain gets thereby irregular.

By using rolls, which'rotate easily on balls or the like, the free part of the brake cord will be drawn off from the rolls without changing the inner tension of the cord.

By the elimination of the uneven drawing off of the warp, it is possible to work quicker with the loom than could be done before.

The cord which runs around the rolls can also be attached at a fixed part of the loom.

I claim:

1. In a loom the combination of a warp beam, with a tension device at each side of the loom comprising a plurality of guiding rolls, a weighted lever, a cord attached at one end to said lever, said cord being passed around said guiding rolls and the end axle of said warp beam, and a counterweight at tached to the other end of said cord.

2. In loom the combination of a warp beam, with a tension device at each side of the loom comprising a plurality of guiding rolls, a weighted lever, a cord attached at one end to said lever, said cord being passed around said guiding rolls and the end axle of said warp beam, a counterweight attached to the other end of said cord, and a stop limiting the movement of said weighted lever.

3. In a loom the combination of a warp beam, with a tension device at each side of the loom comprising two guiding rolls, a weighted lever, a stop limiting the movement of said lever, a cord attached at one end to said lever, said cord passing about one of said rolls, then about the other of said rolls, then about the end axle of the warp beam, and a counterweight attached to the other end of said cord.

In testimony whereof I affix my signature in the presence of two witnesses.

CARL SPANNAGEL.

lVitnesses /VOLDEMAR HAUPT, HENRY HAsPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

